HP kp721av Manuale Utente

The BIOS supports various functions related to the boot process, including those that occur 
during the Power On Self-Test (POST) routine. 

The default boot device order is as follows:

1. CD-ROM drive (EL Torito CD images)

2. Diskette drive (A:)

3. USB device

4. Hard drive (C:)  

5. Network interface controller (NIC)

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The above order assumes all devices are present in the initial configuration. If, for example, a 
diskette drive is not initially installed but added later, then drive A would be added to the end of 
the order (after the NIC)

The order can be changed in the ROM-based Setup utility (accessed by pressing F10 when so 
prompted during POST). The options are displayed only if the device is attached, except for USB 
devices. The USB option is displayed even if no USB storage devices are present.  The hot IPL 
option is available through the F9 utility, which allows the user to select a hot IPL boot device. 

The BIOS supports booting the system to a network server. The function is accessed by pressing 
the F12 key when prompted at the lower right hand corner of the display during POST. Booting 
to a network server allows for such functions as:

■

Flashing a ROM on a system without a functional operating system (OS).

■

Installing an OS.

■

Installing an application.

These systems include, as standard, an integrated Intel 82562-equivalent NIC with Preboot 
Execution Environment (PXE) ROM and can boot with a NetPC-compliant server. 

This system uses the Serial Presence Detect (SPD) method of determining the installed DIMM 
configuration. The BIOS communicates with an EEPROM on each DIMM through the SMBus 
to obtain data on the following DIMM parameters:

■

Presence

■

Size

■

Type

■

Timing/CAS latency

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Refer to Chapter 3, “Processor/Memory Subsystem” for the SPD format and DIMM data specific 
to this system.